Tanguérat Fm
Period:
Cretaceous
Age Interval:
Lower Cretaceous (Albian) to possibly Lower Cenomanian (5)
Province:
East Niger Rift Basin - Téfidet Sub-basin
Type Locality and Naming
Faure, 1966. Named after a high peak in the Téfidet graben, which to the south-east of Tchérézérine, dominates the Tagrezou vertebrate deposits. Group: Téfidet Gr.
References: Faure, 1959, 1966; Fabre et al., 1983; Konaté et al., 2019.
Synonym: Tanguerat Fm; Equivalent(s): Echkar Fm
Lithology and Thickness
Middle-to fine-grained sandstones, either beige-pink or reddish, with a cross- or overturned stratifications at some places associated with hydroplastic deformations. Thickness is more than 200 m.
[Figure 1. Synthetic lithostratigraphic column of the Téfidet trough (Source: Modified from Konaté et al., 2019)]
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
Underlain by the Tagrezou Fm
Upper contact
Overlain by the Alanlara Fm
Regional extent
GeoJSON
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Fossils
Silicified woods are abundant.
Age
Lower Cretaceous (Albian) to possibly Lower Cenomanian? (Upper Cretaceous).
Age Span:
Beginning stage:
Albian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
113.20
Ending stage:
Albian
Fraction up in the ending stage:
1.0
Ending date (Ma):
100.50
Depositional setting
Continental
Depositional pattern:
Additional Information
Compiler:
Jacques LeBlanc (2022), Stratigraphic Lexicon: The Sedimentary Formations of The Republic of Niger, Africa. Colnes Publishing (Tallin, Estonia), 365 pp. https://doi.org/10.47909/978-9916-9760-6-7 (or via https://sites.google.com/site/leblancjacques)